Temperature-regulator.



TATRNTRD 13R/. 1o, 1907.

V. P. DAVIS. TRMPRRATURR REGULATOR.

.APPLXUATION FILED NOV. 21.1906.

'/ilillr 1 l I 9 J w@ WR a" ro VERNER F. DAVISVOF ORANGE, NEW JERSEY.

TEMPERATURE-RE GULATOR.

ne. smoes.

Specification of .Letters Patent.

Patented Dec. 10, 1907.

Application tiled November 2li i906. Serial No. 344,360,

To all whom it may concern:

Be it known that l, VERNEn F. Davis, a citizen ofthe United States,residing at Orange, in thev county of Essex and State or" New Jersey,have invented certain new and useful Improvements inTemperature-Regulators endl do hereby declare the following to be afull, clear, and exact description of the invention, such .as willenable others skilled in the art to which Vit appertains to make and usethe same, reference being had to the accompanying drawings, and toletters oi reference marked thereon,` which form a part ofthisspeciiication. v l

This invention relates to animprovedregulater for controlli-ng thetemperature in its vicinity, and is ofthe class that is adapted to beconnected with a compressed air system to regulate the admission of theair to a diaphragm valve, the diaphragm valve, in these systems, beingheld normally open bymeans or a spring, and closed by the compressedair. This valve is old, and the invention lies in the improved regulatorfor the air control. i

The invention is designed to provide a regulator, of this class, thathas a spring actuated valve to be normally closed, the valve beingopened, by the contraction of the regulator, to admit air to a casing toactuate a piston to cut oli" the air supply to allow the spring closingoi the diaphragm valve.

regulator,

rlhe invention is illustrated in the accoin\ panying drawings, in whichFigure 1 is a central vertical section of the Fig.l 2 is a bottom viewoi the same, and Fig. 3 is a section of the lower part of the regulatortaken at a right-angle to the section in Fig. l.

The device consists oi a casing which has an enlarged upper portion 11,and on the upper portion is screwedV a cover or top 12 which has, on thetop thereof, a boss 13 in which is suit-ably secured a tube 1e whichiurnishes the expanding member, being made of a metal susce tible toslight temperature changes. ln tlie top of the expanding member 14. is ablock 15, and this is surrnounted by a usual stuiiing boX construction16, and workin in thcstulling box and fitting in a screw-t ireadedperforation inthe block 15, is a rod 17, this being turned by a suitablehand ieee 18 which can be graduated, on its outsic e, to indicate itsregulation. Longitucinally arranged in the rod 17 is a perforation 19'which extends from one end oi the rod to the other, and it has asuitable tapered portion which nts iii the recessed end 230 of anon-expanding bar 21, this bar being pv0 vided, near its upper end, witha collar 22 which acts as a guide to assist in holding the bar 21central, and it is vsteadily heldby means of a light s ring 23. Thelower end of the bar 21 furnisiesa recessed portion 22 that receives thepointed end of a `tapered valve 23a, which is seated 4in the valve seat24 by means of a spring 25 which is stronger than the spring 23 at thetop of the bar 21. A plug 26 is inserted underneath the spring 25 togive ita bearing. It will be seen when the spring 25 forces the valve23a shut, it prevents compressed air passing from theV duct 27, which inturn is fed by the tube '2S which is connected, at its lower end, withthe passage 29, this n from a port 36, which is led in through the inletport 31; A. central passage 32 also leads from the assage `for purposes,as will be described ereinafter.

When the temperature in a room gets lower than desired, and the aparatushas been regulated properly, the tu e 14 will contract, the rod 17 willress down on the bar 21, which in turn press down on a valve 23B vandopen it against theipressure ofthe spring '2o. The air can vnow passthrough from the passage 27, and it then'passes down from the tube 14into"a passa e 33, and acts .on the top of the piston 34, and forces thepiston down. This piston is on'one end of a piston rod 35, the other endholdin a' second piston 36, and the pistons are a lowed to go down byreason of an exhaust 37, connecting with the atmosphere, and whichallows no back pressure against the piston 34, and this piston 34 being`milch larger in area than the piston 36, the pistons' are 1 readilyforced downward. Prior to this downward forcing, the' air coming inthrough the inlet 31 and the passage 30, and passing up through thepassage 32, communicates directly and passes out through the outletpassage 38, connected with the outlet port 39, the outlet port 39 beingconnected, as usual in these systems, with a damper regulator, and whenthe pistons go down, the 'piston 36 cuts oi'the ort 38, passes downbeyond it, and the air in the diaphragm va ve and in the passage 38, isthen 1n cornrnunication, through the cylindrical casing, with the outlet37 and is thus vented t0 take the pressure oil the diaphragm valve' andpermit it to open to allow the entrance of a eating medium, After themechanism isin passage receiving'the air,

the position described, and the temperature goes up, the tube 14 willexpand, and the pressure is thus relieved from the spring by reason ofthe bar 21 being allowed to lise., and the valve 23 shuts, closing oii``the air that was entering through the passage 27. As the expansion ofthe tube .14 continues, the spring -keeps the bar 21 seated on the valve23, but the end 20 ot the rod 17 is carried up, and the air in. the tube14 is vented into the atmosphere which takes the pressure oli .the topof the piston 311i, Aby reason ol the air,l above the piston, passingout through the duct 33, and the air going in at the bottom of.' thecasing, through. the passage 32, forces the pistons up, and there againdirect communication. between the inlet passage 3() and the outlet 38,and the diaphragm valve, hereinbetore described, isv

shut. In the construction of the pistons, I prefer to form them from onepiece of metal, y

' round, to fit tightly inside the casing, and

. shrinkingior brazing, to 'the piston rod 35,

they are provided with a circumferential groove 30 to form twobearmgsurfaces en each piston. The pistons are secured, by

and are moved down far enough on the end of the piston rod to allow theend 40, on cach end, of the rod, to engage th(l end of the casing,ineach direction, to keep the end of the piston from being strained bybeing forced against the ends of the casing. These regulators can beadapted for ventilation systems to govern the outlet of air, and theinlet ot' theA same, and can also` be used in systems of refrigeration,the application of them being obvious. Having thus described myinvention, what l claim is:

1. A temperature regulator comprising a casing, a hollow expandingmember, the casing having an inlet connected by a duct at the 'top -tothe expanding member, and a passage at the bottom, a valvy actuated bythe expanding member and adapted to normally close the duct, a 'valve onthe top ol the expanding member, means for the opening of the valve onthe expanding member al'ter the valve on the duct is closed, the casinghaving an air outlet below the pistons and an exhaust between. thepistons, and pistons actuated by the air pressure to control thedirection of the air.4

2. A temperature regulator comprising a casing having an air inletconnected by a duct to an expanding member an air outlet and an exhaust,pistons in the casing, spring actuated valve normally shut to close lthe duet, a hollow expanding member to open the valve, and a valve atthe top of' the expanding member to be opened after the iirst valve isshut. i

3. A` temperature regulator comprising a casing having an air passage atthe top for admitting air connected with an air duct at the top, pistonsin the casing, the casing hav-r ing an outlet and an exhaust, a valve toclose the air duct, a hollow expanding member connected with the ductand having a pasleading from its interior to the interior of the casing,a rod in the hollow member to open the valve when the expanding membercontracts-'and a valve in the top of the expanding member adapt'ed toopen after the lirst valve is closed.

4. A temperature regulator comprising a opening into an expanding memberand hav mg an air outlet near the bottom, the casing also having anexhaust, a piston in the top of the casing, a piston to pass across theair outlet, a rod common to the pistons, a hollow expanding member onthe casing, the casing having a passage to the hollow niembena valve inthe top of the easing, a spring to close the valve to shut oil the duct,a rod actuated by the expanding member to open the valve, and a valve inthe top of the expanding member to' bc opened by the rod after the lirstvalve is shut. l v

5. A temperature regulator comprising a easing having pistons therein,the casm having an air passage for admitting air am having an outlet, ahollow expanding member, the casing having an air duct leading from theinlet passage to' the expanding member, the casing having a passageleading l'rom its interior to the expanding member, a

'valve closing the duct, a spring to close the valve, a rod resting onthe valve, a collar on the rod fitting looselyr in the member, a springbetween theend ol' the member and the collar on the rod, and a secondrod. having a longitudinal perforation adapted to have its lower endseated on the first rod and opening on the other end into theatmosphere.

ln testimony, that I claim the foregoing, I have hereunto set my handthis 19th day of November 1906.

Vannini F. DAVIS.`

Witnesses:

W M. A. CAMFIELD,

E. A. PELL.

